Deep well pump



Aug. 4, 1936. J p JACKSON 2,049,957

DEEP WELL PUMP Filed Oct. 17, 1934 s Sheets-Sheet 1 t I l l I I l a I I I g I98 w 52 '1 I V/l j//// (James F ciao/how,

J. P. JACKSON 2,049,957

DEEP WELL PUMP Filed Oct. 17, 1934 5 Sheets-Sheet'Z m w G W R m w Aug. 4, 1936.

J. P. JACKSON DEEP WELL PUMP Aug. 4, 1936.

Filed Oct. 17, 1934 3'Sheets-Sheet 3 Patented Aug. 4, 1936 UNITED STATES PATENT OFFICE DEEP WELL PUMP James Phillip Jackson, Oklahoma City, Okla.

. Application October 17, 1934, Serial No. 748,703 r 26 Claims, (01. 103-46) This invention relates to improvements in deep well pumps of the type adapted to be actuated by fluid under pressure supplied from a remote point, so that operation of the pump will be effected without the use of sucker rods and the like.

An object of the present invention is to provide an improved pump of the above type especially advantageous for use in pumping liquid from wells, and in which the motivating fluid may be conducted through the well casing to the pump mechanism for effecting actuation thereof, and also in which the exhausted motivating fluid may be discharged through the usual liquid discharge pipe together with the liquid being pumped so as to obviate the use of independent conduits for conducting such motivating fluid and liquid from the pump and so that the exhausted motivating fluid will serve to assist in lifting the pumped liquid.

Another object is to provide a pump of the above kind in whicha plurality of pistons are utilized both as fluid actuated and pumping pistons, thereby obviating the necessity of separate pumping and motor cylinders and pistons with separate valve mechanisms.

A more specific object of the present invention is to provide a pump of the above kind in which two pistons are alternately and directly actuated by the fluid under pressure for pumping the liquid from the well, and whereby the actuation of each piston in one direction for forcing the liquid from the well causes retraction of the other piston to the start of its pumping stroke.

Still another object is to provide a pump of the above type in which a novel and eflicient valve mechanism is provided for controlling the supply and exhaust of the pressure fluid for alternate actuation of the pistons.

Still another object is to provide a pump of the above type embodying a plurality of combined motor and pumping pistons, and in which the parts are so constructed and arranged as to adapt the pump to be operated in a space of 45 small diameter such as is available in wells.

Other objects and advantages of the invention will become apparent as the nature of the same is better understood, and the invention consists in the novel form, combination and arrangement 50 of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings, wherein like reference characters indicate corresponding parts throughout the several views,

55 Figure 1 is a fragmentary view partly broken away and partly in section and partly in elevation, illustrating a-pump embodying the present invention operatively arranged within the casing of a well.

Figure 2 is an enlarged horizontal section on 6 line 2-2 of Figure 3.

Figure 3 is a fragmentary vertical section on the plane of line 3-3 of Figure 2, and drawn on a reduced scale.

Figure, 4 is a view somewhat similar to Figure 10 3 taken on the plane of line 4-4 of Figure 2.

Figure 5 is a view similar to Figure 3 taken on the plane of line 5-5 of Figure 2.

Figure 6 is a horizontal section on line 6-8 of Figure 3. 1 15 Figure 7 is a horizontal section on line 1-1 of Figure 3.

- Figur 8 is a horizontal section on line 8-8 of Figure 9 is a horizontal section on line 9-9 of Figure 3.

Figure 10 is a horizontal section on line Ill-I0 of Figure 4'.

Figure 11 is an enlarged bottom plan view of the inner or lower head for the cylinder block 25 of the pump.

Figure 12 is an elevational view, partly broken away and in section, of one of the piston-actuated push rods. 7

Figure 13 is a fragmentary detail section on line so i3-i3 of Figure 9.

Figure 14 is a view similar to Figure 13, taken on line ll-ll of Figure 9; and

Figure 15 is a fragmentary detail section showing a modification of the means for operatively 35 connecting the pistons.

Referring in detail to the drawings, C indicates generally a well casing, and D indicates a liquid discharge pipe which extends downwardly into the well casing C and to the lower end of which 49 is connected the pump. embodying the present invention and generally indicated at P.

As illustrated, the pump P includes an elongated cylindrical block 5 formed with a pair of adjacent vertical or longitudinal bores t and 7 5 constituting pump and motor cylinders in which are fitted reciprocable pistons 8 and 8 having rigid depending piston rods Ill and H whose lower ends are operatively connected by a chain or other flexible member I! which passes around 50 a pulley or other guide l3 arranged a suitable distance below the block 5. Attached to the lower end of the. block 5 is a tubular casing it into which the piston rods l0 and I l project, the guide or pulley l3 being journaled on the lower end oi a support l5 projecting downwardly into the casing l4 and rigid with and depending from a plate l8 seated in the upper end of casing l4 and clamped against the lower end of block 5 by means of said casing 4. The-block 5 is provided with suitable stuiling boxes I1 and I8 where the piston rods l and II project downwardly therethrough, so as to prevent leakage of the motivating fluid around said piston rods from the cylinders 6 and 1 into the casing l4, as will later become apparent. The lower end of casing l4 has a stem l3 attached thereto, which stem may carry a suitable anchor (not shown) for properly positioning and steadying the pump at the point to which it is lowered within the well casing C.

Formed in the upper end of cylinder block are longitudinal liquid passages 28 and 2| which communicate at their lower ends with the upper ends of cylinders '5 and 1, and which open at their upper ends through the top of the cylinder block 5. The upper end of cylinder block 5 is further provided with lateral liquid intake ports communicating with the liquid passages 20 and 2| and controlled by inwardly opening and outwardly seating check valves 22 and 23 for controlling the supply of the liquid to be pumped from the well casing about the pump into the cylinders 8 and 1 above the pistons 8 and 9. Specifically, the check valves 22 and 23 permit the liquid to be drawn into the cylinders upon the downward or suction strokes of pistons 3 and 9, but close upon the upward or pumping strokes of the pistons so as to cause the liquid to be forced from the cylinders outwardly through the liquid outlet passages 28 and 2|. Seated on the upper end of cylinder 5 is an inner or lower cylinder head 24 provided with vertical passages 25 and 26 registering with the passages 28 and 2|, and seated upon the inner or lower cylinder head 24 is an outer or'upper cylinder head 21 also provided with longitudinal or vertical passages 28 and 29 registered with the passages 25 and 26 of the lower head 24. These heads 24 and 21 are clamped upon the upper end of the cylinder block .5 by means of a cap 38 removably secured on the upper end of the cylinder block 5 and to the upper end of which is connected the lower end of the liquid discharge pipe D, said cap 38 having an internal shoulder intermediate its ends which engages the top of the upper head 21 as clearly shown in Figure 3. This arranges the heads 24 and 21 in the lower portion of cap 30, and provides a chamber 3| within the upper end of cap 30 above the heads 24 and 21 for a purpose which will later become apparent. Short pipes 32 and 33 are threaded in the passages 28 and 2| of the block 5 and project upwardly through the passages 25 and 28 and 26 and 29 and then through the chamber 3| and the top of cap 38 so as to terminate a short distance above the latter within the liquid discharge pipe D. Thus, liquid pumped from the cylinders 5 and 1 is discharged through passage 20 and pipe 32 or passages 2| and pipe 33 into the liquid discharge pipe D at a point above the top of cap 38, to be ultimately forced upwardly through the discharge pipe D to the surface of the well.

The pipes 32 and 33 are made in sections, the

block 5 and are respectively connected at their 5 lower ends by lateral passages 36 and 31 (see Fig. with the lower ends of cylinders 1 and 8. These longitudinal passages 34 and 35 communicate at the upper endof the cylinder block 5 through ports 34a and 35a (Figs. 9 and 13) with 10 valve chambers 38 and 38 (Figs. 3 and 11) provided in the lower cylinder head 24 and com-' municating with longitudinal passages and 4| provided in the upper cylinder head 21 and opening through the top of the latter into the chamher 3| in the top of cap 38. Also provided in the cylinder block 5 are longitudinal bores 42 and 43 which open at their lower ends into the upper ends-of the respective cylinders 6 and 1 and commlmicate at their upper ends through the top of the cylinder block with passages 44 and 45 provided in the lower cylinder head 24 as shown clearly in Figure 5. The passages 44 and 45 communicate with a. recess or chamber 46 provided in the upper cylinder head 21, and extending downwardly into the well from a suitable source of supply of fluid under pressure such as an air or gas compressor (not shown) is a fluid pressure supply pipe 41 which passes through the top of cap 38 and connects with the top of upper cylinder head 21 so as to open into passages 46a and 45b communicating with opposite sides of chamber 45. This fluid pressure supply pipe 41 is pref-'- erably provided with a suitable downwardly opening and upwardly seating check valve 48. Formed in the lower cylinder head 24 above the chamber 46 are valve seats 49 and 58 on which slidably mounted plug valves 5| and 52 seat for controlling the flow of fluid under pressure from chamber to the respective passages 44 and 45. These valves 5| and 52 are interconnected by a rocking lever 53 and connecting rods 54, the lever 53 being pivoted intermediate its ends to an upstanding post 55 rigid with the lower cylinder head 24 and projecting upwardly into the head 21. Longitudinally slidable push rods 56 and 51 are arranged in the passages 42 and 44 and 43 and 45,

. respectively. Each of these push rods consists 01' a lower section snugly slidably fitted in the passage 42 or 43 and an upper section projecting upwardly through the passage 44 or 45 for en-- gagement with the under side of the associated valve 5| or 52. Also, the push rods are made longitudinally yieldable by slidably fitting the lower ends of the upper sections of said push rods within the upper ends of the associated lower sections thereof, and interposing a spring 58 between the sections as shown clearly in Figure 12. Springs 59 and 53a normally force the push rods 58 and 51 downwardly so that their lower ends 60 project into the upper ends of the cylinders 8 and 1, whereby when either piston 8 or 3 moves upwardly it will engage the pushrod projecting into its cylinder and force such push rod upwardly to elevate and thereby open the associated valve 5| or 52, the other of these valves being simultaneously forced downwardly to closed position through the medium of the connection composed of lever 53 and connecting rods 54. The operating flt of the lower sections of the push rods in the passages 42 and 43 minimize leakage of fluid under, pressure past the same into the upper ends of the cylinders 6 and 1, and the longitudinally, yieldable nature of the push rods permits them to collapse slightly should the same be necessary 76 the advantage of absorbing shocks incident to sudden contact of the pistons therewith.

As shown more clearly in Figures 9, 13 and 14, inclined ports 66 and 6| are provided to place the lower ends of the passages 44 and 45 and .the upper sides of passages 42 and 43 in com-.

munication with interior of socketed plugs 66' and 6| fitted in the upper ends of the longitudinal passages 34 and 35 of the cylinder block 5. It will be noted that the ports 34a and 66 extend through the block and plug 66', while the ports 35a and 6| extend through the block 5 and plug 6| (Figures 9, 13 and 14).

Arranged in the valve chambers 36 and 39 and depending into the sockets of plugs 66' and 6|'.'

are seating valves 62 and 63 having stems 64 and projecting upwardly through the passages 46 and 4| and connected by a rocking lever 66 suitably pivotally mounted within the chamber 3|. It is particularly noted that the inclined ports 34a and 35a open through the top of block 5 at the bottoms of valve chambers 38 and 39 and outwardly of opposite sides of the valves 62 and 63, whereby the latter will not interfere at any time with flow of fluid under pressure from passages 44 and 42 and 43 and 45 through said ports '34a and 35a into passages 34 and 35. Said valves 62 and 63 therefore simply control the flow of motive fluid under pressure outwardly from passages 34 and 35 to passages 46 and 4| when exhausted from the respective cylinders 1 and 6 behind or beneath the respective pistons 9 and 6. It will still further be noted that fluid under pressure is admitted to the chambers 36 and 39 alternately or at different times. Thus, when fluid under pressure is admitted to passage 35 by way of port 6| and ports 35a, it will first enter the socket of plug 6| beneath the valve 63, thereby forcing said valve 63 upwardly to seating position and causing unseating of valve 62 through the operative connection 64, 65 and 66. The reversal of this operation will of course take place when the fluid under pressure is admitted to passage 34, the same first entering the socket of plug 60' through port 66 and beneath valve 62. Obviously.

when valve 62 is thus raised and seated and fluid.

under pressure is supplied to passage 34 it will flow into the lower end of cylinder 1'so as to force the piston 9 upwardly, thereby causing the latter piston to forcibly discharge the liquid ahead of the latter from the cylinder 1. At the same time, the piston 8 is caused to lower and the air or used motive fluid behind or beneath said piston 8 is .forced by the latter out of the lower end of cylinder 6 by way of passages 31 and 36, ports 36a and valve chamber 39 into passage 4| and thence into chamber 3|. At this time the valve 63 will be seated in plug 6| and the valve 52 will be closed so that the exhausting fluid may not pass from passage 35 by way of port 6| and passage 45 into chamber 46. On the other hand, when the piston 9 has reached its uppermost position as shown in Figure 5, it will have actuated push rod 51 so as to open valve 52 and close valve 5|, thus cutting off the supply of fluid pressure to the bottom of cylinder 1 and admitting fluid under pressure to the bottom oi cylinder 6 by way of passages 45 and 43, port 6|, valve chamber 39, ports 35a, and passages 36 and 31. As the fluid under pressure enters the socket of plug 6| from port 6| and beneath valve 63, the latter is forced .will seat valve 63 and open valve 62. As the pisupwardly to seated or closed pasition and valve 62 is simultaneously opened. The piston 6 then rises, forcing the liquid from the upper portion of cylinder 6 and cause the piston 9 to lower, the fluid behind or below the piston 9 exhausting from 3 cylinder 1 by way of passages 36 and 34, ports 34a, valve chamber 36, and passage 46 into chamber 3|. This cycle of operation continues as long as fluid under pressure is supplied to chamber 46 by way of pipe 41, the valve and piston actuation 10 being, entirely automatic. It will of course be understood that the liquid to be pumped to the surface of the well will be drawn through the check valves 22 and 23 into the upper ends of cylinders 6 and 1 on the downward or suction strokes iii of the pistons 6 and 9. It will be noted that the fluid under pressure is exhausted from the cylinders into the chamber 3|, and is allowed to escape from the latter through a plurality of check valves 61 provided 20 in the top of cap 30, said check valves 61 being upwardly opened under the influence of the fluid under pressure within the chamber 3|. When the pump is not in operation, the check valves 61 will normally close to prevent flow of liquid from 26 the pipe D into the chamber 3|. Also, as the liquid pumped from the cylinders 6 and 1 is discharged from the pipes 32 and 33 into the liquid discharge pipe D at a point some distance above the cap 36 and above the point where the exhausted pres- 30 sure fluid escapes irom chamber 3| through check valves 61 into said discharge pipe D, said exhausted pressure fluid will assist in lifting the pumped liquid and no independent conduit is necessary for conveying the exhausted pressure 35 fluid from the pump.

Assuming that the parts are positioned as shown in the several views, the fluid under pressure will flow from pipe 41 into chamber 46,

'way of port 6|, valve chamber 39 and ports 35a topassage 35, and thence by way of passage 31 into the lower end of cylinder 6 behind piston 8. The fluid under pressure entering plug 6| ten 8 is forced upwardly, it will force the fluid from the upper portion of cylinder 6 as before mentioned and will cause downward movement of piston 9. As piston 9 moves downwardly it will force the fluid behind the same from the lower portion of cylinder 1 into chamber 3| by way of passages 36 and 3 ports 34a, valve chamber 36 and passage 40, the exhausted motivating fluid ultimately discharging into the lower end of pipe D through check valves 61 and beneath the liquid being discharged into pipe D from the pipe 32. As the piston 6 nears its upward limit of movement it engages push rod 56 to move the same upwardly and cause opening of valve 5| and closing of valve 52. In this way the supply of 60 motivating fluid is cut off from cylinder 6 and allowed to flow to cylinder 1 beneath the piston 9 which has been lowered, such motivating fluid flowing to cylinder 1 by way of passage 44, port 66. valve chamber 38, ports 34a, and passages 34 65 and 36. As the motivating fluid enters plug 66 it closes valve 62 and opens valve 63, and as piston 9 is elevated piston 6 is lowered, the fluid being forced by piston 6 from the lower end of cylinder I by piston 9 and discharged into pipe D some distance above the cap 30. Thus, each time liquid is discharged from one of the cylinders, motivating fluid is exhausted from the other cylinder, and the exhausted motivating fluid is discharged into the pipe D below the liquid discharged therein, so as to assist in lifting the latter. As before stated, this cycle of operation is continuously repeated as long as motivating fluid is supplied to chamber 48.

Any suitable means may be employed for operatively connecting the pistons 8 and 9, so that when either piston is actuated by fluid pressure to force the liquid from its cylinder, the other piston will be given its suction stroke in the opposite direction to draw liquid into the cylinder of the latter piston. For instance, the piston rods may be in the nature oi. racks as shown at "la and Ila in Figure 15, said racks meshing with opposite sides of a pinion l journaled on the lower end of a rod Ia similar to rod I5 of Figure 4.

While I have shown and described a specific embodiment of my invention, I do not limit myself to the exact details of construction and arrangement shown, but may employ such changes in the construction and arrangement 01' parts, should occasion so require, as fairly come within the meaning and scope of the appended claims.

What I claim as new is:

1. In a pump, a pair of adjacent cylinders, a piston in each cylinder, pumping chambers in said cylinders at the outer sides of the pistons thcrein, means operatively connecting said pistons whereby outward movement of either piston will cause inwardmovement oi! the other piston, means for supplying motive fluid to said cylinders at the inner sides of the pistons therein for causing alternate outward movement of said pistons, valves for controlling the exhaust oi motive fluid from said cylinders, means interconnecting said valves whereby closing of one will cause opening of the other, and means whereby the motive fluid supplied to either cylinder will cause closing of the exhaust controlling valve of such cylinder and opening of the exhaust controlling valve of the other cylinder.

2. In a pump, a pair of adjacent cylinders, a piston in each cylinder, pumping chambers in said cylinders at the outer sides of the pistons therein, means operatively connecting said pistons whereby outward movement of either piston will cause inward movement of the other piston, means for supplying motive fluid to said cylinders at the innersides of the pistons therein for V causing alternate outward movement of said pistons, said motive fluid supplying means including valves for controlling the supply oi! the motive fluid to said cylinders, means interconnecting said valves whereby opening of one will cause closing of the other, and reciprocable push rods projecting into said cylinders for alternate actuation by said pistons on their outward pumping movements for actuating said valves to cut off the supply of motive fluid from either cylinder when the piston therein approaches its outward limit of movement and to simultaneously permit supply of the motive fluid to the other cylinder as the piston in the latter approaches its inward limit of movement.

3. In a pump, a pair of adjacent cylinders, a piston in each cylinder, pumping chambers in said cylinders at the outer sides of the pistons therein, means operatively connecting said pistons whereby outward movement of either piston will cause inward movement of the other piston, means tor supplying motive fluid to said cylinders at the inner sides 01 the pistons therein for causing alternate outward movement of said 5 pistons, a liquid discharge pipe connected to the upper ends of said cylinders, means for conducting the liquid pumped from the cylinders and discharging it at an elevated point within said discharge pipe, and means for conducting and discharging the exhausted motive fluid from the cylinders into said liquid discharge pipe at 'a point below the point of discharge of the pumped liquid therein.

4. In a pump, a pair of adjacent cylinders, a piston in each cylinder, means connecting said pistons, pumping chambers in said cylinders at the outer ends of said pistons, means for supplying motive fluid to said cylinders at the inner ends oi. the pistons for causing movement of the pistons, valves for controlling the exhaust of motive fluid from said cylinders, and means whereby the motive fluid supplied to either cylinder will cause closing of the exhaust controlling valve of such cylinder and opening of the exhaust controlling valve of the other cylinder.

5. In a pump, a pair of adjacent cylinders, a piston in each cylinder, pumping chambers in said cylinders at the outer ends of said pistons, means for supplying motive fluid to said cylinders 3 at the inner ends of the pistons for causing movement of the pistons, valves for controlling the exhaust of motive fluid from said cylinders, means whereby the motive fluid supplied to either cylinder will cause opening of the exhaust controlling 'valve of the other cylinder, and flexible means connecting said pistons whereby movement of one piston under power of motive fluid will move the other piston.

6. In a pump, a pair of adjacent cylinders, a piston in each cylinder acting as a pumping piston and a power piston, means connecting said pistons, means for supplying motive fluid to said cylinders at one end of said pistons, valves for controlling the supply of motive fluid to said cylinders, and independent means operated by each piston for operating the valves controlling the delivery of motive fluid to the cylinders, said valve operating means and said valves arranged whereby each piston will actuate the valves to cut oil. the supply of motive fluid to its cylinder and open the supply to the other cylinder.

'7. In a pump, a pair of adjacent cylinders, a piston in each cylinder acting as a pumping piston and a power piston, means connecting said pistons, means for supplying motive fluid to said cylinders at one end of said pistons for causing movement of the pistons, valves for controlling the supply of motive fluid to said cylinders, independent means operated by each piston for operating the valve controlling the delivery or ,motive fluid to the cylinders, valves for controlling the exhaust oi motive fluid from said cylinders, and

means whereby the motive fluid supplied to either cylinder will cause closing 01' the exhaust controlling valve of such cylinder and the opening of the exhaust controlling valve of the other cylinder.

8. In a pump, a pair of adjacent cylinders, a piston in each cylinder acting as a pumping piston and a power piston, means connecting said pistons, means for supplying motive fluid to said cylinders at one end of said pistons, valves for controlling the supply of motive fluid to said cylinders, independent means operated by each piston for operating the valve controlling the delivery of motive fluid to the cylinders, said valve operating means and said valves arranged whereby each piston will actuate the valves to cut off the supply of motive fluid to its cylinder and open the supply to the other cylinder, valves for con trolling the exhaust of motive fluid from said cylinders, and means whereby the motive fluid supplied to either cylinder will cause opening of the exhaust controlling valve oi the other cylinder.

9. In a pump, a pair ofadjacent cylinders, a. piston in each cylinder acting as a pumping piston and a power piston, means connecting said pistons, means for supplying motive fluid to said cylinders at one end of said pistons, valves for controlling the supply of motive fluid to said cylinders, independent means operated by eachpiston for operating the valves controlling the'delivcry of motive fluid to the cylinders, valves for controlling the exhaust of motive fluid from said cylinders, means whereby the motive fluid supplied to either cylinder will cause closing of the exhaust controlling valve of such cylinder and the opening of the exhaust controlling valve of the other cylinder, and means interconnecting said exhaust controlling valves whereby the closing of one valve will cause opening of the other valve.

10. In a pump, a pair of adjacent cylinders provided with inlets for inlet of fluid to be pumped, a piston in each cylinder, means connecting said pistons, pumping chambers in said cylinders at the outer ends of said pistons, means for supplying motive fluid to said cylinders at the inner ends of the pistons for causing movement of the pistons, valves for controlling the exhaust of motive fluid from said cylinders, means where by the motive fluid supplied toeither cylinder will cause closing of the exhaust controlling valve of such cylinder and opening of the exhaust controlling valve of the other cylinder, a liquid discharge pipe connected to the upper ends of said cylinders, means for conducting the liquid pumped from the cylinders and discharging it at an elevated point within said discharge pipe, and means for conducting and discharging the exhaust motive fluid from the cylinders into said liquid discharge pipe at a point below the point of discharge of the pumped liquid therein.

11. In a pump, a pair of adjacent cylinders having inlets for fluid to be pumped, a piston in each cylinder acting as a pumping piston and a power piston, means connecting said pistons, means for supplying motive fluid to said cylinders at one end of said pistons, valves for controlling the supply of motive fluid to said cylinders, independent means operated by each piston for operating the valves controlling the delivery of motive fluid to the cylinders, said valve operating means and said valves arranged whereby each piston will actuate the valves to cut oil the supply of motive fluid to its cylinder and open the sup ply to the other cylinder, a liquid discharge pipe connected to the upper ends of said cylinders, means for conducting the liquid pumped from the cylinders and discharging it at an elevated point within said discharge pipe, and means for conducting and discharging the exhaust motive fluid from the cylinders into said liquid discharge pipe at a point below the point of discharge oi the pumped liquid therein.

12. In a deep well pump, a pair of cylinders, a piston in each cylinder, means connecting said pistons, means for supplying motive fluid to said cylinders at the inner ends of the pistons for causin'g movement of the pistons, said motive fluid supplying means including valves for controlling the supply of motive fluid to said cylinders, reciprocable push rods projecting into said cylinders for actuation by said pistons on their outward pumping movements for actuating said? valves to cut off the supply of motive fluid from either cylinder when the piston therein approaches its outward limit of movement, and means connecting said valveswhereby the movement of one valve to cut oil the supply of motive fluid to one cylinder will open the other valve to admit motive fluid to the other cylinder.

13. In a deep well pump, a pair of cylinders. a piston in each cylinder, means for supplying motive fluid to said cylinders at the inner ends of the pistons for causing movement of the pistons, means connecting said pistons whereby movement of one piston under power of motive fluid will move the other piston said motive fluid supplying means including valves for controlling the supply of motive fluid to said cylinders, reciprocable push rods projecting into said cylinders for actuation by said pistons on their outward pumping movements for actuating said valves to cut ofi the supply of motive fluid from either cylinder when the piston therein approaches its outward limit of movement, means connecting said valves whereby the movement of one valve to cut off the supply of motive fluid to one cylinder will open the other valve to admit motive fluid to the other cylinder, valves for controlling the exhaust of motive fluid from said cylinders, and means whereby the motive fluid supplied to either cylinder will cause closing of the exhaust controlling valve of such cylinder and opening of the exhaust controlling valve of the other cylinder. a

14. In a deep well pump, a pair of cylinders having inlets for fluid to be pumped, a piston in each cylinder acting both as a pumping piston and a power piston, means connecting said pistons, means for supplying motive fluid to said cylinders for moving said pistons, a liquid discharge pipe connected to the upper ends of said cylinders, means for conducting the liquid pumped from the cylinders and discharging it at an elevated point within said discharge pipe, and means for conducting and discharging the exhausted motive fluid from the cylinders into said liquid discharge pipe at a point below a point of discharge of the pumped liquid therein.

15. In a deep well pump, a pair of cylinders having inlets for liquid to be pumped, a piston in each cylinder acting both as a pumping piston and a power piston, means connecting said pistons, means for supplying motive fluid to said cylinders for moving said pistons, a liquid discharge pipe connected to the upper ends of said cylinders, means for conducting the liquid pumped from the cylinders and discharging it at an elevated point within said discharge pipe, means for conducting and discharging the exhausted motive fluid from the cylinders into said liquid discharge pipe at a point below a point of discharge of the pumped liquid therein, and means operated by incoming motive fluid to said cylinders for controlling the exhausting of motive fluid from said cylinders.

16. In a deep well pump, a pair of adjacent cylinders, a piston in each cylinder acting as both a power piston and a pump piston, valves for controlling the delivery of motive fluid to said cylinders, independent means operated by each piston for opening said valves, means connecting said valves whereby the opening of one valve will close the other one, and means connecting said pistons whereby pump discharging movement of one piston under power of motive fluid will move the other piston in pump suction movement.

17. In a deep well pump, a pair of adjacent cylinders, a piston in each cylinder acting as both a power piston and a pump piston, means connecting said pistons, valves for controlling the delivery oi motive fluid to said cylinders, means operated by said pistons for opening said valves, means interconnecting said valves whereby the opening of one valve will close the other valve, valves controlling the exhaust of motive fluid from said cylinders, and means whereby the operating 01 said motive fluid supply control valves will operate said exhaust control valves.

18. In a deep well pump, a pair of adjacent cylinders, a piston in each cylinder acting as both a power piston and a pump piston, means connecting said pistons, valves for controlling the delivery of motive fluid to said cylinders, means operated by said pistons for opening said valves, means interconnecting said valves whereby the opening 01' one valve will close the other valve, valves controlling theexhaust oi motive fluid from said cylinders, means whereby the operating of said motive fluid supply control valves will operate said exhaust control valves, and means connecting said exhaustvalves whereby the closing of one exhaust valve will mechanically open the other exhaust valve.

19. In a deep well pump, a pair of adjacent cylinders having inlets for fluid to be pumped, a piston in each cylinder acting as both a power and a pumping piston, valves for controlling the delivery of motive fluid to said cylinders, means operated by said pistons for opening said valves, a pivoted lever interconnecting said valves whereby the opening of one valve will close the other, and flexible means connecting said pistons whereby pump discharging movement of one piston under power of motive fluid will move the other a piston in pump suction movement.

20. In a deep well pump, a pair of adjacent cylinders having inlets for liquid to be pumped, a piston in each cylinder acting as both a power and a pumping piston, means connecting said pistons, valves for controlling the delivery of motive fluid to said cylinders, means operated by said pistons for opening said valves, a pivoted lever interconnecting said valves whereby the opening of one valve will close the other, valves controlling the exhaust of motive fluid from said cylinders, means whereby the operating of said motive fluid supply control valves will operate said exhaust control valves, and a pivoted lever connecting said exhaust control valves whereby the closing of one exhaust valve will open the other exhaust valve.

ply and exhaust passages, said pump provided with passages for fluid to be pumped communicating with the upper or outer ends of said cylinders, selective valves controlling the delivery of motive fluid into said motive fluid passages, and means operated by said pistons for operating said valves whereby one piston will open a valve to admit motive fluid to the cylinder of the other piston.

22. In a deep well pump, a cylinder block having a pair of parallel cylinders therein, said 5 cylinders having inlets and outlets for liquid to be pumped, a piston in each cylinder, means connecting said pistons, said cylinder block provided with motive fluid passages communicating with the inner ends of said cylinders and acting alternately as fluid supply andexhaust passages, distributor blocks at one end of said passages and provided with passageways for controlling the inlet of motive fluid to the passages and with other passageways for controlling the exhaust of 16 motive fluid from said passages, valves cooperating with said distributing blocks for controlling the exhaust passages in said distributing blocks, valves for controlling the delivery of motive fluid to said passages, means for operating said fluid 20 delivery control valves, and means whereby the operation of said motive delivery control valves will control operation oi said exhaust valves.

23. In a deep well pump, a cylinder block having a pair of parallel cylinders therein, said cylin- 25 ders having inlets and outlets for liquid to be pumped, a piston in each cylinder, means connecting said pistons, said cylinder block provided with motive fluid passages communicating with the inner ends of said cylinders and acting alter- 30 nately as fluid supply and exhaust passages, distributor blocks at one end of said passages and provided with passageways for controlling the inlet of motive fluid to the passages and with other passageways for controlling the exhaust of motive fluid from said passages, valves cooperating with said distributing blocks for controlling the exhaust passages in said distributing blocks, valves for controlling the delivery of motive fluid to said passages, means for operating said fluid delivery control valves, means whereby the operation of said motive delivery control valves will 5 control operation 01! said exhaust valves, a liquid discharge pipe connected to the upper ends 01' said cylinders, means for conducting the liquid pumped from the cylinders and discharging it at an elevated point within said discharge pipe, and means for conducting and discharging the exhausted motive fluid from the cylinders to said liquid discharge pipe at a point below the point of discharge of the pumped liquid therein.

24. In a deep well pump, a cylinder block having a pair of parallel cylinders therein, said cylinders having inlets and outlets for liquid to be pumped, a piston in each cylinder, means connecting said pistons, said cylinder block provided with motive fluid passages communicating with the inner ends of said cylinders and acting alternately as fluid supply and exhaust passages, distributor blocks at one end of said passages and provided with passageways for controlling the inlet of motive fluid to the passages and with other passageways for controlling the exhaust of motive fluid from said passages, valves cooperating with said distributing blocks for controlling the exhaust passages 65 in said distributing blocks, valves for controlling the delivery of motive fluid to said passages, means for operating said fluid delivery control valves, means whereby the operation 01' said motive delivery control valves will control operation 70 of said exhaust valves, 'a liquid discharge pipe connected to the upper ends 01' said cylinders, means for conducting the liquid pumped from the cylinders and discharging it at an elevated point within said discharge pipe, and valved liquid 75 inlet connections for inlet of fluid to be pumped to the cylinders communicating with said last named means.

25. In a, deep well pump, cylinders, pistons therein, means connecting said pistons, valves for controlling the delivery of piston moving fluid to said cylinders, push rods moved by said pistons in valve opening movement, and springs for moving said rods out of valve opening movement.

26. In a deep well pump, cylinders, pistons therein, means connecting said pistons, valves for controlling the delivery of piston moving fluid to rods composed of telescoping yieldably connected sections.

JAMES PHILLIP JACKSON. 

